CVE-2026-26738: Buffer Overflow vulnerability in Uderzo Software SpaceSniffer v.2.0.5.18 allows a remote attacker to execute a

Routine

HIGH 7.8DOWNGRADE

CVE-2026-26738 is a high-severity flaw (CVSS 7.8) affecting spacesniffer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer Overflow vulnerability in Uderzo Software SpaceSniffer v.2.0.5.18 allows a remote attacker to execute arbitrary code via a crafted .sns snapshot file.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-03-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: uderzo

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-10 18:18 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

uderzo spacesniffer DOWNGRADE

Affected: 2.0.5.18

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0.5.18

1. Check installed version

apt-cache policy spacesniffer || rpm -q spacesniffer || spacesniffer --version

2. No fixed release: DOWNGRADE to a release before 2.0.5.18 (Debian / Ubuntu)

apt-cache madison spacesniffer sudo apt install spacesniffer=<VERSION_BEFORE_2.0.5.18> sudo apt-mark hold spacesniffer

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list spacesniffer sudo dnf downgrade spacesniffer-<VERSION_BEFORE_2.0.5.18> sudo dnf versionlock add spacesniffer

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-26738?

spacesniffer: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-26738 being exploited?

CVE-2026-26738 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-26738 affect?

CVE-2026-26738 affects spacesniffer. Severity is high (CVSS 7.8). Buffer Overflow vulnerability in Uderzo Software SpaceSniffer v.2.0.5.18 allows a remote attacker to execute arbitrary code via a crafted .sns snapshot file.

How urgent is CVE-2026-26738?

Priority 32/100. High severity

References

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